Drilldown: Patents

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Patents > Applicant firm: None & Filing date: September 1910 & Number of claims: 3-5

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airplane (10) · construction (6) · stability (6) · propellers (5) · frame (4) · design (4) · propeller (4) · None (4) · balance (3) · automatic stability (3) · takeoff (3) · Control (3) · hybrid (3) · helicopter (3)
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